<template>
  <div class="login_container">
    <!-- 头像 -->
    <div class="login_box">
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 表单登陆区域 -->
      <el-form
        ref="resetFormRef"
        class="login_form"
        :model="loginForm"
        :rules="loginFormRules"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            prefix-icon="iconfont icon-user"
            v-model="loginForm.username"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            prefix-icon="iconfont icon-3702mima"
            v-model="loginForm.password"
            type="password"
          ></el-input>
        </el-form-item>
        <!-- 登陆按钮 -->
        <el-form-item class="login_btn">
          <el-button type="primary" @click="login">登陆</el-button>
          <el-button type="info" @click="resetloginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 用户数据绑定
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 用户输入验证
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 15, message: '长度在 3 到 15 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 16, message: '长度在 6 到 16 个字符', trigger: 'blur' }
        ]
      }
    };
  },

  methods: {
    // 点击重置表单
    resetloginForm() {
      // console.log(this);
      this.$refs.resetFormRef.resetFields();
    },
    // 点击登陆
    login() {
      // 对表单进行预验证, 通过为true, 否则为false
      this.$refs.resetFormRef.validate(async valid => {
        if (!valid) return;
        const { data: res } = await this.$http.post('login', this.loginForm);
        if (res.meta.status !== 200)
          return this.$message.error('密码或用户名错误, 请重新输入');
        this.$message.success('登陆成功');
        console.log(res);
        window.sessionStorage.setItem('token', res.data.token);
        // 编程式导航
        this.$router.push('/home');
      });
    }
  }
};
</script>

// lang 表示可以使用less 编写样式, scoped 表示样式只在本组件里有效, 没有表示全局
<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}

.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 5px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    border: 1px solid #eee;
    padding: 10px;
    box-sizing: border-box;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 10px #ddd;
    background-color: #fff;

    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      box-shadow: 0 0 10px #ddd;
      background-color: #eee;
    }
  }
}

.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 30px;
  box-sizing: border-box;

  .login_btn {
    display: flex;
    justify-content: flex-end;
  }
}
</style>
